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Stockholders' Equity - Additional Information (Detail) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | --- | --- | ---
May 21, 2018 | Mar. 08, 2018 | Apr. 15, 2016 | Nov. 30, 2017 | Nov. 30, 2016 | May 31, 2012 | May 31, 2018 | May 31, 2017 | Feb. 28, 2017 | May 31, 2018 | May 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  | 51,636 | 0 |  | 51,636 | 0
Shares granted during period |  |  |  |  |  |  |  |  |  | 51,636 |
Amended And Restated Employment Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  |  |  |  |  | $ 0 | $ 0 |  | $ 0 | $ 0
Second Amendment Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation costs |  |  |  |  |  |  | $ 0 | $ 0 |  | $ 0 | $ 0
Description on second amendment to employment agreement |  |  |  |  |  |  |  |  |  | The Amendment provides for the grant of shares of the Company’s common stock based on certain performance measures being attained by the Company during fiscal year 2016 and fiscal year 2017. The Amendment states if Executive is employed by the Company on November 30, 2016 and November 30, 2017, then no later than February 28, 2017 and February 28, 2018, respectively, the Company will grant Executive up to 20,000 shares of restricted stock based on performance as set forth in the Amendment per each fiscal year. |
David Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  | 186,487 | 121,801 | 183,145 |  |  |  |  | 91,801 |
Mark Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  | 162,163 | 105,915 | 159,257 |  |  |  |  | 75,915 |
Payment of stock appreciation right |  |  |  |  |  |  |  |  |  | $ 444,000 |
Payment of stock appreciation right, shares |  |  |  |  |  |  |  |  |  | 30,000 |
Oleg Mikulinksy [Member] | Second Amendment Agreement [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  |  |  |  |  |  | 20,000 |  |
Share based compensation options fair value |  |  |  | $ 80,000 |  |  |  |  |  |  |
Shares granted during period |  |  |  | 14,729 |  |  |  |  | 19,620 |  |
2006 Plan [Member] | Employee Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  |  |  |  | 1,000,000 |  |  | 1,000,000 |
Option issued |  |  |  | 457,250 |  |  | 444,000 |  |  | 444,000 |
Shares issued under stock incentive plan |  |  |  |  |  |  | 319,929 |  |  | 319,929 |
2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Common stock for issuance pursuant to stock options or restricted stock |  |  |  |  |  |  | 1,500,000 |  |  | 1,500,000 |
Shares issued under stock incentive plan |  |  |  |  |  |  | 809,251 |  |  | 809,251 |
2012 Plan [Member] | Employee Stock Incentive Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Increase in common stock reserved for issuance |  |  |  |  |  | 2,500,000 |  |  |  |  |
Service Based Stock Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 621,365 |
Service Based Restricted Shares [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 129,729 |
Performance Based Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 823,415 |
Market Based Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 116,240 |
Service-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  |  |  | 51,636 |
Service-Based Vesting Condition Options [Member] | 2006 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | $ 123,000 |  |  | $ 123,000 |
Service-Based Vesting Condition Options [Member] | 2012 Plan [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | 123,000 |  |  | 123,000 |
Employee Stock Incentive Plan [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | 91,000 |  |  | 91,000 |
Employee Stock Incentive Plan [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | 19,000 |  |  | $ 19,000 |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] | December 1, 2016 [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] | November 30, 2017 [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] | David Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  | 23,636 |  |  |  |  |  |  |  |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] | Mark Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  | 20,000 |  |  |  |  |  |  |  |  |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche Two [Member] | December One Two Thousand Eighteen [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche Two [Member] | November Thirty Two Thousand Nineteen [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation, vesting percentage |  |  |  |  |  |  |  |  |  | 33.30% |
Employee Stock Incentive Plan [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche Two [Member] | Oleg Mikulinksy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period | 8,000 |  |  |  |  |  |  |  |  |  |
Employee Stock Incentive Plan [Member] | Selling, General and Administrative Expenses [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation options fair value |  |  |  |  |  |  |  |  |  | $ 48,000 |
Employee Stock Incentive Plan [Member] | Selling, General and Administrative Expenses [Member] | 2012 Plan [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation options fair value |  |  |  |  |  |  |  |  |  | 9,000 |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  | 0 |  |  | 0
Market-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Granted, Shares |  |  |  |  |  |  |  | 0 |  |  | 0
Restricted Common Shares [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | 0 | $ 362,000 |  | 0 | $ 362,000
Share based compensation options fair value |  |  |  |  |  |  |  |  |  | 756,000 |
Performance and Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation options fair value |  |  |  |  |  |  |  |  |  | $ 73,550 |
Performance and Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche One [Member] | David Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  |  |  |  |  |  |  |  | 47,273 |
Performance and Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche One [Member] | Mark Portnoy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  |  |  |  |  |  |  |  | 40,000 |
Performance and Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | 6,750 |  |  | $ 6,750 |
Performance and Market-Based Vesting Condition Options [Member] | Share-based Compensation Award, Tranche Two [Member] | Oleg Mikulinksy [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares granted during period |  |  |  |  |  |  |  |  |  | 8,000 |
Performance and Market-Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member] | Share-based Compensation Award, Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation cost related to non-vested service related share-based compensation arrangements granted |  |  |  |  |  |  | $ 73,550 |  |  | $ 73,550 |
Performance and Market-Based Vesting Condition Options [Member] | Selling, General and Administrative Expenses [Member] | Share-based Compensation Award, Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Share based compensation options fair value |  |  |  |  |  |  |  |  |  | $ 6,750 |
Stock Option [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of share issued to option holder |  |  |  |  |  |  | 1,000 | 7,500 |  | 2,250 | 26,781
Options exercised |  |  |  |  |  |  | $ 2,670 | $ 17,900 |  | $ 4,920 | $ 51,396
Stock Option [Member] | Service-Based Vesting Condition Options [Member] |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Weighted-average period |  |  |  |  |  |  |  |  |  | 1 year 4 months 13 days |
Total fair value of shares vested |  |  |  |  |  |  |  |  |  | $ 116,000 |

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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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